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General| Focal Length | 90mm |
|---|---|
| Maximum Aperture | f/2.8 |
| Minimum Aperture | f/22 |
| Lens Mount | Pentax 6x7 |
| Leaf Shutter | Yes |
| Shutter Speed | 1/500 sec |
| Format Compatibility | Medium Format |
| Filter Size | 67mm |
| Length | 80mm |
Detailed identification and description of all external lens parts and their functions.
Step-by-step guide for attaching and detaching the lens to the camera body.
How to use the lens normally without engaging its shutter.
Procedure for high-speed flash sync for fill-in flash using both shutters.
Crucial advice regarding mirror lock-up, shutter cocking, and U/S lever for flash sync.
How to achieve multiple exposures using the lens shutter independently.
Using the lens shutter to minimize camera shake for single shots.
Key points for performing multiple exposures correctly.
How to synchronize auto extension tubes for close-up shooting with the lens shutter.
Procedure for using auto bellows with the lens shutter and locked camera shutter.
Details on synchronizing electronic flash, MF, and M flash bulbs with the lens shutter.
Essential safety and operational advice for flash photography.
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